Logging DHT11 data to an SD card

This is another simple project using a Wemos MIni and a couple of shields. This time we will connect a DHT11 shield and an SD card shield and we will log some temperature data from the dht11 to an sd card. The data will be saved as a csv file, this means you can quite easily open in Microsoft Excel.

dht11

The 2 shields use the following I/O pins, the DHT uses D4 and the SD card uses the SPI pins D5, D6, D7 and D8